added api endpoints

This commit is contained in:
2026-06-06 21:25:37 +02:00
parent 419e05bb89
commit 28bf03d1a3
7 changed files with 596 additions and 155 deletions

591
handlers/api.go Normal file
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@@ -0,0 +1,591 @@
package handlers
import (
"MiauInv/models"
"MiauInv/storage"
"database/sql"
"encoding/json"
"log"
"net/http"
"strconv"
"strings"
)
func Location(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
switch r.Method {
case http.MethodGet:
idStr := r.URL.Query().Get("id")
if idStr != "" {
id, err := strconv.Atoi(idStr)
if err != nil {
http.Error(w, "Invalid ID parameter", http.StatusBadRequest)
return
}
var loc models.Location
err = storage.DB.QueryRow("SELECT id, name FROM locations WHERE id = ?", id).Scan(&loc.ID, &loc.Name)
if err != nil {
if err == sql.ErrNoRows {
log.Println("GET [api/locations] " + r.RemoteAddr + ": Location not found (ID " + idStr + ")")
http.Error(w, "Location not found", http.StatusNotFound)
return
}
log.Println("GET [api/locations] DB Error: " + err.Error())
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
json.NewEncoder(w).Encode(loc)
log.Println("GET [api/locations] " + r.RemoteAddr + ": Successfully retrieved location ID " + idStr)
return
}
rows, err := storage.DB.Query("SELECT id, name FROM locations ORDER BY name ASC")
if err != nil {
log.Println("GET [api/locations] " + r.RemoteAddr + ": " + err.Error())
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
defer rows.Close()
var locations []models.Location
for rows.Next() {
var loc models.Location
if err := rows.Scan(&loc.ID, &loc.Name); err != nil {
log.Println("GET [api/locations] Scan Error: " + err.Error())
continue
}
locations = append(locations, loc)
}
if locations == nil {
locations = []models.Location{}
}
json.NewEncoder(w).Encode(map[string]interface{}{
"locations": locations,
})
log.Println("GET [api/locations] " + r.RemoteAddr + ": Successfully retrieved all locations")
case http.MethodPost:
var body struct {
Name string `json:"name"`
}
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
log.Println("POST [api/locations] Decode Error: " + err.Error())
http.Error(w, "Invalid request body", http.StatusBadRequest)
return
}
if strings.TrimSpace(body.Name) == "" {
http.Error(w, "Location name cannot be empty", http.StatusBadRequest)
return
}
res, err := storage.DB.Exec("INSERT INTO locations(name) VALUES(?)", body.Name)
if err != nil {
log.Println("POST [api/locations] DB Error: " + err.Error())
http.Error(w, "Location already exists or database error", http.StatusConflict)
return
}
lastID, _ := res.LastInsertId()
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(models.Location{
ID: int(lastID),
Name: body.Name,
})
log.Println("POST [api/locations] " + r.RemoteAddr + ": Successfully created location " + body.Name)
case http.MethodPut:
idStr := r.URL.Query().Get("id")
if idStr == "" {
http.Error(w, "Missing ID parameter for update", http.StatusBadRequest)
return
}
id, err := strconv.Atoi(idStr)
if err != nil {
http.Error(w, "Invalid ID parameter", http.StatusBadRequest)
return
}
var body struct {
Name string `json:"name"`
}
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
log.Println("PUT [api/locations] Decode Error: " + err.Error())
http.Error(w, "Invalid request body", http.StatusBadRequest)
return
}
if strings.TrimSpace(body.Name) == "" {
http.Error(w, "Location name cannot be empty", http.StatusBadRequest)
return
}
res, err := storage.DB.Exec("UPDATE locations SET name = ? WHERE id = ?", body.Name, id)
if err != nil {
log.Println("PUT [api/locations] DB Error: " + err.Error())
http.Error(w, "Location name unique constraint failed or database error", http.StatusConflict)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Location not found", http.StatusNotFound)
return
}
json.NewEncoder(w).Encode(models.Location{
ID: id,
Name: body.Name,
})
log.Println("PUT [api/locations] " + r.RemoteAddr + ": Successfully updated location ID " + idStr)
case http.MethodDelete:
idStr := r.URL.Query().Get("id")
if idStr == "" {
http.Error(w, "Missing ID parameter for deletion", http.StatusBadRequest)
return
}
id, err := strconv.Atoi(idStr)
if err != nil {
http.Error(w, "Invalid ID parameter", http.StatusBadRequest)
return
}
res, err := storage.DB.Exec("DELETE FROM locations WHERE id = ?", id)
if err != nil {
log.Println("DELETE [api/locations] DB Error: " + err.Error())
http.Error(w, "Cannot delete location. It might still be in use by inventory stock.", http.StatusConflict)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Location not found", http.StatusNotFound)
return
}
w.WriteHeader(http.StatusNoContent)
log.Println("DELETE [api/locations] " + r.RemoteAddr + ": Successfully deleted location ID " + idStr)
default:
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}
func Item(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
switch r.Method {
case http.MethodGet:
idStr := r.URL.Query().Get("id")
// Read One
if idStr != "" {
id, err := strconv.Atoi(idStr)
if err != nil {
http.Error(w, "Invalid ID parameter", http.StatusBadRequest)
return
}
var item models.Item
err = storage.DB.QueryRow("SELECT id, name, category, description, total_quantity FROM items WHERE id = ?", id).
Scan(&item.ID, &item.Name, &item.Category, &item.Description, &item.TotalQuantity)
if err != nil {
if err == sql.ErrNoRows {
http.Error(w, "Item not found", http.StatusNotFound)
return
}
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
json.NewEncoder(w).Encode(item)
return
}
// Read All
rows, err := storage.DB.Query("SELECT id, name, category, description, total_quantity FROM items ORDER BY name ASC")
if err != nil {
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
defer rows.Close()
items := []models.Item{}
for rows.Next() {
var item models.Item
rows.Scan(&item.ID, &item.Name, &item.Category, &item.Description, &item.TotalQuantity)
items = append(items, item)
}
json.NewEncoder(w).Encode(map[string]interface{}{"items": items})
case http.MethodPost:
var body models.Item
if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
http.Error(w, "Invalid request body", http.StatusBadRequest)
return
}
res, err := storage.DB.Exec("INSERT INTO items(name, category, description, total_quantity) VALUES(?, ?, ?, ?)",
body.Name, body.Category, body.Description, body.TotalQuantity)
if err != nil {
http.Error(w, "Database error", http.StatusInternalServerError)
return
}
lastID, _ := res.LastInsertId()
body.ID = int(lastID)
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(body)
case http.MethodPut:
idStr := r.URL.Query().Get("id")
if idStr == "" {
http.Error(w, "Missing ID parameter", http.StatusBadRequest)
return
}
id, _ := strconv.Atoi(idStr)
var body models.Item
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("UPDATE items SET name = ?, category = ?, description = ?, total_quantity = ? WHERE id = ?",
body.Name, body.Category, body.Description, body.TotalQuantity, id)
if err != nil {
http.Error(w, "Database error", http.StatusInternalServerError)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Item not found", http.StatusNotFound)
return
}
body.ID = id
json.NewEncoder(w).Encode(body)
case http.MethodDelete:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
// SQLite blockiert dank FK, falls Item noch im Stock oder Projekten ist
res, err := storage.DB.Exec("DELETE FROM items WHERE id = ?", id)
if err != nil {
http.Error(w, "Cannot delete item. Still referenced in stock or projects.", http.StatusConflict)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Item not found", http.StatusNotFound)
return
}
w.WriteHeader(http.StatusNoContent)
default:
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}
func Project(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
switch r.Method {
case http.MethodGet:
idStr := r.URL.Query().Get("id")
if idStr != "" {
id, _ := strconv.Atoi(idStr)
var p models.Project
err := storage.DB.QueryRow("SELECT id, name, description FROM projects WHERE id = ?", id).Scan(&p.ID, &p.Name, &p.Description)
if err == sql.ErrNoRows {
http.Error(w, "Project not found", http.StatusNotFound)
return
}
json.NewEncoder(w).Encode(p)
return
}
rows, err := storage.DB.Query("SELECT id, name, description FROM projects ORDER BY name ASC")
if err != nil {
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
defer rows.Close()
projects := []models.Project{}
for rows.Next() {
var p models.Project
rows.Scan(&p.ID, &p.Name, &p.Description)
projects = append(projects, p)
}
json.NewEncoder(w).Encode(map[string]interface{}{"projects": projects})
case http.MethodPost:
var body models.Project
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("INSERT INTO projects(name, description) VALUES(?, ?)", body.Name, body.Description)
if err != nil {
http.Error(w, "Project name already exists", http.StatusConflict)
return
}
lastID, _ := res.LastInsertId()
body.ID = int(lastID)
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(body)
case http.MethodPut:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
var body models.Project
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("UPDATE projects SET name = ?, description = ? WHERE id = ?", body.Name, body.Description, id)
if err != nil {
http.Error(w, "Project name constraint violation", http.StatusConflict)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Project not found", http.StatusNotFound)
return
}
body.ID = id
json.NewEncoder(w).Encode(body)
case http.MethodDelete:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
res, err := storage.DB.Exec("DELETE FROM projects WHERE id = ?", id)
if err != nil {
http.Error(w, "Cannot delete project. Clear active item assignments first.", http.StatusConflict)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Project not found", http.StatusNotFound)
return
}
w.WriteHeader(http.StatusNoContent)
default:
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}
func Stock(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
switch r.Method {
case http.MethodGet:
idStr := r.URL.Query().Get("id")
if idStr != "" {
id, _ := strconv.Atoi(idStr)
var s models.Stock
err := storage.DB.QueryRow("SELECT id, item_id, location_id, quantity FROM stock WHERE id = ?", id).
Scan(&s.ID, &s.ItemID, &s.LocationID, &s.Quantity)
if err == sql.ErrNoRows {
http.Error(w, "Stock entry not found", http.StatusNotFound)
return
}
json.NewEncoder(w).Encode(s)
return
}
rows, err := storage.DB.Query("SELECT id, item_id, location_id, quantity FROM stock")
if err != nil {
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
defer rows.Close()
stocks := []models.Stock{}
for rows.Next() {
var s models.Stock
rows.Scan(&s.ID, &s.ItemID, &s.LocationID, &s.Quantity)
stocks = append(stocks, s)
}
json.NewEncoder(w).Encode(map[string]interface{}{"stock": stocks})
case http.MethodPost:
var body models.Stock
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("INSERT INTO stock(item_id, location_id, quantity) VALUES(?, ?, ?)",
body.ItemID, body.LocationID, body.Quantity)
if err != nil {
http.Error(w, "Failed to link stock. Ensure Item and Location exist.", http.StatusBadRequest)
return
}
lastID, _ := res.LastInsertId()
body.ID = int(lastID)
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(body)
case http.MethodPut:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
var body models.Stock
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("UPDATE stock SET item_id = ?, location_id = ?, quantity = ? WHERE id = ?",
body.ItemID, body.LocationID, body.Quantity, id)
if err != nil {
http.Error(w, "Failed to update stock. Verify Foreign Keys.", http.StatusBadRequest)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Stock entry not found", http.StatusNotFound)
return
}
body.ID = id
json.NewEncoder(w).Encode(body)
case http.MethodDelete:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
res, _ := storage.DB.Exec("DELETE FROM stock WHERE id = ?", id)
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Stock entry not found", http.StatusNotFound)
return
}
w.WriteHeader(http.StatusNoContent)
default:
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}
func Associations(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
switch r.Method {
case http.MethodGet:
idStr := r.URL.Query().Get("id")
projectIDStr := r.URL.Query().Get("project_id")
// Optionaler Filter: Alle Items für ein bestimmtes Projekt holen (?project_id=X)
if projectIDStr != "" {
pID, _ := strconv.Atoi(projectIDStr)
rows, err := storage.DB.Query("SELECT id, item_id, project_id, quantity FROM project_items WHERE project_id = ?", pID)
if err != nil {
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
defer rows.Close()
list := []models.ProjectItem{}
for rows.Next() {
var pi models.ProjectItem
rows.Scan(&pi.ID, &pi.ItemID, &pi.ProjectID, &pi.Quantity)
list = append(list, pi)
}
json.NewEncoder(w).Encode(map[string]interface{}{"associations": list})
return
}
// Einzelne Assoziation anhand der Tabellen-ID (?id=X)
if idStr != "" {
id, _ := strconv.Atoi(idStr)
var pi models.ProjectItem
err := storage.DB.QueryRow("SELECT id, item_id, project_id, quantity FROM project_items WHERE id = ?", id).
Scan(&pi.ID, &pi.ItemID, &pi.ProjectID, &pi.Quantity)
if err == sql.ErrNoRows {
http.Error(w, "Association not found", http.StatusNotFound)
return
}
json.NewEncoder(w).Encode(pi)
return
}
// Gar kein Parameter -> Komplett-Dump aller Zuweisungen
rows, err := storage.DB.Query("SELECT id, item_id, project_id, quantity FROM project_items")
if err != nil {
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
defer rows.Close()
all := []models.ProjectItem{}
for rows.Next() {
var pi models.ProjectItem
rows.Scan(&pi.ID, &pi.ItemID, &pi.ProjectID, &pi.Quantity)
all = append(all, pi)
}
json.NewEncoder(w).Encode(map[string]interface{}{"associations": all})
case http.MethodPost:
var body models.ProjectItem
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("INSERT INTO project_items(item_id, project_id, quantity) VALUES(?, ?, ?)",
body.ItemID, body.ProjectID, body.Quantity)
if err != nil {
http.Error(w, "Link failed. Check item_id and project_id.", http.StatusBadRequest)
return
}
lastID, _ := res.LastInsertId()
body.ID = int(lastID)
w.WriteHeader(http.StatusCreated)
json.NewEncoder(w).Encode(body)
case http.MethodPut:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
var body models.ProjectItem
json.NewDecoder(r.Body).Decode(&body)
res, err := storage.DB.Exec("UPDATE project_items SET item_id = ?, project_id = ?, quantity = ? WHERE id = ?",
body.ItemID, body.ProjectID, body.Quantity, id)
if err != nil {
http.Error(w, "Update failed. Check Constraints.", http.StatusBadRequest)
return
}
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Association not found", http.StatusNotFound)
return
}
body.ID = id
json.NewEncoder(w).Encode(body)
case http.MethodDelete:
idStr := r.URL.Query().Get("id")
id, _ := strconv.Atoi(idStr)
res, _ := storage.DB.Exec("DELETE FROM project_items WHERE id = ?", id)
rowsAffected, _ := res.RowsAffected()
if rowsAffected == 0 {
http.Error(w, "Association not found", http.StatusNotFound)
return
}
w.WriteHeader(http.StatusNoContent)
default:
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}

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@@ -1,41 +0,0 @@
package handlers
import (
"MiauInv/models"
"MiauInv/storage"
"encoding/json"
"net/http"
)
func GetItems(w http.ResponseWriter, r *http.Request) {
items, err := storage.GetItems()
if err != nil {
http.Error(w, err.Error(), 500)
return
}
json.NewEncoder(w).Encode(items)
}
func CreateItem(w http.ResponseWriter, r *http.Request) {
var item models.Item
err := json.NewDecoder(r.Body).Decode(&item)
if err != nil {
http.Error(w, err.Error(), 400)
return
}
err = storage.AddItem(item)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
w.WriteHeader(http.StatusCreated)
}

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@@ -1,20 +0,0 @@
package handlers
import (
"MiauInv/storage"
"net/http"
)
func CreateLocation(w http.ResponseWriter, r *http.Request) {
name := r.FormValue("name")
_, err := storage.DB.Exec(
"INSERT INTO locations(name) VALUES(?)",
name,
)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
}

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@@ -1,34 +0,0 @@
package handlers
import (
"MiauInv/storage"
"encoding/json"
"net/http"
)
type ProjectItemRequest struct {
ItemID int `json:"item_id"`
ProjectID int `json:"project_id"`
Quantity int `json:"quantity"`
}
func AllocateToProject(w http.ResponseWriter, r *http.Request) {
var req ProjectItemRequest
json.NewDecoder(r.Body).Decode(&req)
_, err := storage.DB.Exec(`
INSERT INTO project_items(item_id,project_id,quantity)
VALUES(?,?,?)
`,
req.ItemID,
req.ProjectID,
req.Quantity,
)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
}

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@@ -1,21 +0,0 @@
package handlers
import (
"MiauInv/storage"
"net/http"
)
func CreateProject(w http.ResponseWriter, r *http.Request) {
name := r.FormValue("name")
_, err := storage.DB.Exec(
"INSERT INTO projects(name) VALUES(?)",
name,
)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
}

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@@ -1,34 +0,0 @@
package handlers
import (
"MiauInv/storage"
"encoding/json"
"net/http"
)
type StockRequest struct {
ItemID int `json:"item_id"`
LocationID int `json:"location_id"`
Quantity int `json:"quantity"`
}
func AddStock(w http.ResponseWriter, r *http.Request) {
var req StockRequest
json.NewDecoder(r.Body).Decode(&req)
_, err := storage.DB.Exec(`
INSERT INTO stock(item_id,location_id,quantity)
VALUES(?,?,?)
`,
req.ItemID,
req.LocationID,
req.Quantity,
)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
}

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@@ -77,11 +77,11 @@ func (this *Server) Run() {
mux.HandleFunc("/api/refresh", handlers.RefreshToken) mux.HandleFunc("/api/refresh", handlers.RefreshToken)
mux.Handle("/api/logout", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Logout))) mux.Handle("/api/logout", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Logout)))
mux.HandleFunc("/api/item", handlers.GetItems) mux.Handle("/api/item", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Item)))
mux.HandleFunc("/api/locations", handlers.CreateLocation) mux.Handle("/api/location", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Location)))
mux.HandleFunc("/api/project", handlers.CreateProject) mux.Handle("/api/project", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Project)))
mux.HandleFunc("/api/stock/add", handlers.AddStock) mux.Handle("/api/stock", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Stock)))
mux.HandleFunc("/api/project-items/add", handlers.AllocateToProject) mux.Handle("/api/association", auth.AuthMiddleware(this.JWTSecret)(http.HandlerFunc(handlers.Associations)))
// Assets // Assets
mux.HandleFunc("/assets/", frontend.Assets) mux.HandleFunc("/assets/", frontend.Assets)